Which potassium fertilizer is known to contain 44-46% K2O?

The potassium fertilizer that contains 44-46% K2O is potassium chloride, commonly referred to as KCl. KCl is widely recognized for its high potassium content, typically ranging from 60% to 62% K, which translates to approximately 44-46% K2O. This makes it one of the most efficient and commonly used potassium fertilizers in agriculture.

Potassium plays a vital role in plant growth as it regulates various physiological processes, including water uptake, enzyme activation, and photosynthesis. The high percentage of K2O found in KCl ensures that plants receive a significant amount of potassium, which is essential for optimal growth and development.

Other options like potassium nitrate (KNO3) and potassium sulfate (K2SO4) contain potassium but in lower percentages compared to the KCl. Potassium nitrate is valued for its nitrogen content as well, and potassium sulfate provides a source of sulfur. However, neither achieves the same concentration of K2O that KCl does. Potassium thiosulfate (K2S2O3), while also a source of potassium, typically does not have the same level of K2O concentration as KCl. Therefore, potassium chloride is the best choice when looking for a